yes me too same link. Funny I used his currying code in my solution but I see that maybe it was overkill?

"Create a method to accept a single argument, an arbitrary input string, and return a string of length 26."

This sentence is confusing to read. I first thought it meant the method had to accept more than one argument. My suggestion:

"Create a method to accept one arbitrary string as an argument, and return a string of length 26."

I'm getting a failure for the test case. There doesn't appear to be one at all.